Rachicerus Walker

Key to Brazilian species of the genus Rachicerus Walker 1 Antenna with less than 19 flagellomeres................................................................... 2 - Antenna with 20 or more flagellomeres................................................................... 5 2 Antenna bipectinate with 19 flagellomeres; scutum orange; abdomen black, with bluish reflections... R. carrerai Pujol-Luz - Antenna single pectinate with 16 or 17 flagellomeres; scutum entirely or partially blackish to brownish; abdomen blackish to yellowish without, with bluish reflections.................................................................. 3 3 Antenna with 18 flagellomeres; 1 st, 2 nd and 3 rd abdominal segments yellowish..................... R. oliverioi Carrera - Antenna with 16–17 flagellomeres; abdominal segments blackish to brownish.................................... 4 4 Antenna with 16 flagellomeres.................................................. R. isabelae Pujol-Luz sp. nov. - Antenna with 17 flagellomeres................................................... R. victori Pujol-Luz sp. nov. 5 Antenna with 20 flagellomeres; abdominal segments black with intersegmentar membrane whitish......................................................................................... R. rafaeli Pujol-Luz & Godoi sp. nov. - Antenna with 21 to 28 flagellomeres; abdominal segments predominantly blackish or brownish....................... 6 6 Antenna with 22 or 25 flagellomeres..................................................................... 7 - Antenna with 28 flagellomeres.......................................................................... 8 7 Antenna with 22 flagellomeres, 2 nd, sometimes 3 rd; abdominal segments whitish...................... R. lanei Carrera - Antenna with 25 flagellomeres; abdominal segments bright black................................. R. lopesi Carrera 8 Longitudinal veins strongly darkened; abdomen entirely black................................. R. marcusi Carrera - Longitudinal veins darkened only in costal region of the wings; 2 nd abdominal segment bright yellow... R. shannoni Carrera